【摘要】：擬并列運(yùn)行變壓器線端之間電壓異常,不符合并列投運(yùn)條件的現(xiàn)象時(shí)有發(fā)生,為快速分析確定變壓器并列運(yùn)行前不滿足并列條件的原因,開展本課題的研究。利用變壓器電氣接線原理圖和變壓器勵(lì)磁后三相鐵心柱的磁通分布規(guī)律,來分析擬并列運(yùn)行變壓器不同線端之間的電壓矢量關(guān)系,可指導(dǎo)變壓器并列運(yùn)行工程現(xiàn)場和變壓器制造企業(yè)技術(shù)人員快速分析不滿足并列條件的原因,在變壓器生產(chǎn)過程和變壓器安裝工程中提前采取相應(yīng)的預(yù)防措施。本文開展的工作內(nèi)容有：1.利用變壓器電氣接線原理圖、繞組電勢(shì)矢量圖和三相鐵心磁路分布圖,研究了常用聯(lián)結(jié)組標(biāo)號(hào)變壓器并列運(yùn)行時(shí),在不滿足并列運(yùn)行條件下并列運(yùn)行變壓器不同線端之間電壓矢量關(guān)系的變化。較詳細(xì)地分析了擬并列運(yùn)行變壓器并列運(yùn)行前因電力線路安裝時(shí)或變壓器生產(chǎn)過程中引起的變壓器電源進(jìn)線側(cè)或負(fù)荷側(cè)接線錯(cuò)誤、變壓器接入電源缺相或輸出端缺相及變壓器聯(lián)結(jié)組標(biāo)號(hào)不一致時(shí),并列運(yùn)行變壓器不同線端之間電壓矢量關(guān)系的變化。并對(duì)變壓器分接開關(guān)檔位不一致、變壓器制造過程中出現(xiàn)的線端引線接線錯(cuò)誤或技術(shù)資料明示的聯(lián)結(jié)組標(biāo)號(hào)標(biāo)識(shí)錯(cuò)誤等各種原因引起的并列運(yùn)行變壓器不同線端之間的電壓矢量關(guān)系作了簡要介紹。2.分析了變壓器制造企業(yè)工序生產(chǎn)、工序檢驗(yàn)、成品試驗(yàn)和成品檢驗(yàn)過程中,可能出現(xiàn)并影響變壓器并列運(yùn)行條件的原因,并提出了相應(yīng)的預(yù)防措施。3.分析了變壓器安裝現(xiàn)場交接驗(yàn)收、變壓器并列運(yùn)行一次和二次線路安裝工程中,可能出現(xiàn)并影響變壓器并列運(yùn)行條件的原因,并提出了相應(yīng)的預(yù)防措施。4.本文系統(tǒng)地分析了擬并列運(yùn)行變壓器在不滿足并列運(yùn)行條件下不同線端之間的電壓矢量關(guān)系,分析了在變壓器生產(chǎn)過程和安裝工程中可能引發(fā)不滿足并列條件的原因,并提出了相應(yīng)的預(yù)防措施。研究成果可為并列運(yùn)行變壓器安裝、維護(hù)檢修和變壓器制造企業(yè)技術(shù)人員快速分析事故原因,提前采取相應(yīng)的預(yù)防措施等工程實(shí)際問題提供參考。
[Abstract]:The phenomenon of abnormal voltage between the terminals of quasi-parallel operation transformers, which does not conform to the condition of parallel operation, occurs from time to time. In order to quickly analyze and determine the reasons why the parallel conditions of transformers do not meet the parallel conditions before parallel operation of transformers, the research of this subject is carried out. Based on the principle diagram of transformer electrical connection and the distribution rule of magnetic flux of three-phase core post after transformer excitation, the voltage vector relationship between different line ends of quasi-parallel operation transformer is analyzed. It can guide the technical personnel of transformer parallel operation project and transformer manufacturing enterprise to quickly analyze the reasons why the parallel conditions are not satisfied, and take corresponding preventive measures in advance in transformer production process and transformer installation project. The contents of this paper are as follows: 1. Based on the principle diagram of transformer electrical connection, the vector diagram of winding EMF and the distribution diagram of three-phase core magnetic circuit, this paper studies the parallel operation of commonly used coupling-group label transformers. The variation of voltage vector relationship between different line terminals of parallel operation transformer without satisfying parallel operation condition. This paper analyzes in detail the errors in connection of power line side or load side of transformer power supply caused by installation of power line or production of transformer before parallel operation of quasi-parallel operation transformer. When the transformer is connected to the power source or the output terminal is short of phase and the number of the transformer connection group is inconsistent, the variation of the voltage vector relationship between the different line ends of the transformer is run side by side. And the transformer tap switch gear position is not consistent, The relationship of voltage vector between different terminals of parallel operating transformers caused by wire end lead wiring errors or technical data explicit connection group labeling errors caused by transformer manufacturing process is briefly introduced. 2. This paper analyzes on the reasons that may appear and affect the parallel operation conditions of transformers in the process of production, inspection, test of finished products and inspection of finished products in transformer manufacturing enterprises, and puts forward the corresponding preventive measures. This paper analyzes on the reasons that may appear and affect the condition of transformer parallel operation in the field of transformer installation and acceptance, the primary and secondary line installation engineering in parallel operation of transformer, and puts forward the corresponding preventive measures. This paper systematically analyzes the voltage vector relationship between different line terminals of quasi-parallel operation transformers under unsatisfied parallel operation conditions, and analyzes the reasons that may lead to unsatisfied parallel conditions in transformer production process and installation engineering. The corresponding preventive measures are put forward. The research results can provide a reference for the practical engineering problems such as the installation of parallel operation transformer maintenance and repair and the rapid analysis of accident causes by technicians in transformer manufacturing enterprises and the adoption of corresponding preventive measures in advance.
【學(xué)位授予單位】：浙江工業(yè)大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2014
【分類號(hào)】：TM41
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本文編號(hào)：2334852